.x-s3d {
  --s3d-bg: #0A0A0B; --s3d-card: #141417; --s3d-raised: #1B1B1E;
  --s3d-line: #27272A; --s3d-line2: #3F3F46; --s3d-tx: #FAFAFA; --s3d-mu: #A1A1AA;
  --s3d-blue: #50A2FF; --s3d-heat: #F59E0B; --s3d-heat2: #FCD34D;
  margin: clamp(2.5rem, 6vw, 4.5rem) 0 0; color: var(--s3d-tx); font-family: var(--font-heading);
}
.x-s3d *, .x-s3d *::before, .x-s3d *::after { box-sizing: border-box; }
.x-s3d__head { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1.5rem; max-width: 46rem; }
.x-s3d__eyebrow { margin: 0; font-family: var(--font-mono); font-size: var(--fs-label, .875rem); letter-spacing: .02em; color: var(--s3d-blue); }
.x-s3d__title { margin: 0; font-size: clamp(1.375rem, 2.4vw, 1.75rem); line-height: 1.25; font-weight: 600; letter-spacing: -.01em; color: var(--s3d-tx); }

.x-s3d__tabs { display: inline-flex; gap: 4px; padding: 4px; margin-bottom: 1.25rem; border: 1px solid var(--s3d-line); border-radius: 999px; background: var(--s3d-card); max-width: 100%; overflow-x: auto; scrollbar-width: none; }
.x-s3d__tabs::-webkit-scrollbar { display: none; }
.x-s3d__tabs[hidden] { display: none; }
.x-s3d__tab { flex: 0 0 auto; display: inline-flex; align-items: center; gap: .5rem; min-height: 44px; padding: 0 1.1rem; border: 0; border-radius: 999px; background: transparent; color: var(--s3d-mu); font: 500 .9375rem/1 var(--font-heading); cursor: pointer; transition: background var(--dur-fast, 160ms) var(--ease-out, ease), color var(--dur-fast, 160ms) var(--ease-out, ease); }
.x-s3d__tab:hover { color: var(--s3d-tx); }
.x-s3d__tab[aria-selected="true"] { background: var(--s3d-raised); color: var(--s3d-tx); box-shadow: inset 0 0 0 1px var(--s3d-line2); }
.x-s3d__tab-n { font-family: var(--font-mono); font-size: .8125rem; color: var(--s3d-mu); }
.x-s3d__tab[aria-selected="true"] .x-s3d__tab-n { color: var(--s3d-blue); }
.x-s3d :focus-visible { outline: 2px solid var(--s3d-blue); outline-offset: 2px; }

.x-s3d__body { display: grid; gap: 1.5rem; }
.x-s3d__panel { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 1.5rem 2rem; align-items: center; padding: 1.5rem; border: 1px solid var(--s3d-line); border-radius: var(--radius-xl, 24px); background: var(--s3d-card); }
.x-s3d__panel[hidden] { display: none; }
.x-s3d__alt { display: block; width: 100%; height: auto; }
.x-s3d__steps { list-style: none; margin: 0; padding: 0; counter-reset: none; }
.x-s3d__step { position: relative; border-top: 1px solid var(--s3d-line); }
.x-s3d__step:last-child { border-bottom: 1px solid var(--s3d-line); }
.x-s3d__step-btn { display: flex; align-items: baseline; gap: .75rem; width: 100%; min-height: 44px; padding: .7rem 0 .35rem; border: 0; background: none; color: var(--s3d-tx); font: 600 1rem/1.35 var(--font-heading); text-align: left; cursor: default; }
.x-s3d__step-n { flex: 0 0 auto; font: 500 .8125rem/1.35 var(--font-mono); color: var(--s3d-mu); }
.x-s3d__step-d { display: grid; grid-template-rows: 1fr; margin: 0; padding: 0 0 .75rem 2.1rem; color: var(--s3d-mu); font-size: var(--fs-small, .9375rem); line-height: 1.55; }
.x-s3d__step-d > span { min-height: 0; overflow: hidden; }
.x-s3d__stage[hidden] { display: none; }
.x-s3d__cap { margin-top: 1rem; font-size: .875rem; color: var(--s3d-mu); }

.x-s3d.is-webgl .x-s3d__body { grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); gap: 2rem; align-items: start; }
.x-s3d.is-webgl .x-s3d__panel { display: block; padding: 0; border: 0; background: none; }
.x-s3d.is-webgl .x-s3d__panel[hidden] { display: none; }
.x-s3d.is-webgl .x-s3d__alt { display: none; }
.x-s3d.is-webgl .x-s3d__step-btn { cursor: pointer; color: var(--s3d-mu); padding-bottom: .7rem; transition: color var(--dur-fast, 160ms) var(--ease-out, ease); }
.x-s3d.is-webgl .x-s3d__step-btn:hover { color: var(--s3d-tx); }
.x-s3d.is-webgl .x-s3d__step-d { grid-template-rows: 0fr; padding-bottom: 0; transition: grid-template-rows var(--dur-slow, 420ms) var(--ease-out, ease), padding var(--dur-slow, 420ms) var(--ease-out, ease); }
.x-s3d.is-webgl .x-s3d__step.is-on .x-s3d__step-btn { color: var(--s3d-tx); padding-bottom: .35rem; }
.x-s3d.is-webgl .x-s3d__step.is-on .x-s3d__step-n { color: var(--s3d-blue); }
.x-s3d.is-webgl .x-s3d__step-d > span { opacity: 0; transition: opacity var(--dur-base, 240ms) var(--ease-out, ease); }
.x-s3d.is-webgl .x-s3d__step.is-on .x-s3d__step-d { grid-template-rows: 1fr; padding-bottom: .9rem; }
.x-s3d.is-webgl .x-s3d__step.is-on .x-s3d__step-d > span { opacity: 1; transition-delay: 120ms; }
.x-s3d.is-webgl .x-s3d__step::before { content: ""; position: absolute; left: -1rem; top: -1px; bottom: -1px; width: 2px; background: var(--s3d-blue); transform: scaleY(0); transform-origin: top; transition: transform var(--dur-slow, 420ms) var(--ease-out, ease); }
.x-s3d.is-webgl .x-s3d__step.is-on::before { transform: scaleY(1); }

.x-s3d__stage { position: relative; aspect-ratio: 16 / 11; border: 1px solid var(--s3d-line); border-radius: var(--radius-xl, 24px); overflow: hidden; isolation: isolate;
  background: radial-gradient(120% 90% at 50% 38%, #18181C 0%, #111114 46%, #0A0A0B 100%); }
.x-s3d__stage::after { content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: inherit; z-index: 1;
  background: radial-gradient(120% 95% at 50% 45%, transparent 55%, rgba(6,6,8,.55) 100%); box-shadow: inset 0 1px 0 rgba(255,255,255,.05); }
.x-s3d__canvas { position: absolute; inset: 0; transition: opacity 260ms var(--ease-in-out, ease); cursor: grab; }
.x-s3d__canvas:active { cursor: grabbing; }
.x-s3d__canvas.is-fading { opacity: 0; }
.x-s3d__canvas canvas { display: block; width: 100% !important; height: 100% !important; outline: none; }

.x-s3d__hud { position: absolute; top: 1rem; left: 1.1rem; right: 1.1rem; display: flex; justify-content: space-between; pointer-events: none; z-index: 2; }
.x-s3d__count, .x-s3d__hint { font: 500 .8125rem/1 var(--font-mono); color: var(--s3d-mu); }
.x-s3d__hint { display: inline-flex; align-items: center; gap: .4rem; transition: opacity var(--dur-slow, 420ms); }
.x-s3d__hint::before { content: ""; width: 14px; height: 14px; border: 1px solid var(--s3d-line2); border-radius: 50%; box-shadow: inset 0 0 0 3px var(--s3d-bg), inset 0 0 0 4px var(--s3d-mu); }
.x-s3d.is-touched .x-s3d__hint { opacity: 0; }

.x-s3d__tag { position: absolute; left: 0; top: 0; display: flex; align-items: center; pointer-events: none; z-index: 2; opacity: 0; transition: opacity 300ms var(--ease-out, ease); will-change: transform; }
.x-s3d__tag.is-on { opacity: 1; }
.x-s3d__tag-dot { flex: 0 0 auto; width: 10px; height: 10px; margin: -5px; border-radius: 50%; background: var(--s3d-blue); box-shadow: 0 0 0 3px rgba(80,162,255,.25), 0 0 14px rgba(80,162,255,.7); }
.x-s3d__tag-line { flex: 0 0 auto; width: 34px; height: 1px; margin-left: 5px; background: linear-gradient(90deg, rgba(80,162,255,.9), rgba(80,162,255,.25)); }
.x-s3d__tag-text { padding: .45rem .7rem; border: 1px solid var(--s3d-line2); border-radius: 10px; background: rgba(20,20,23,.86); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); color: var(--s3d-tx); font: 600 .875rem/1.25 var(--font-heading); width: max-content; }
.x-s3d__tag.is-left { flex-direction: row-reverse; }
.x-s3d__tag.is-bar { left: .75rem; right: .75rem; top: 2.5rem; transform: none !important; }
.x-s3d__tag.is-bar .x-s3d__tag-dot, .x-s3d__tag.is-bar .x-s3d__tag-line { display: none; }
.x-s3d__tag.is-bar .x-s3d__tag-text { width: 100%; max-width: none; padding: .55rem .75rem; border-left: 2px solid var(--s3d-blue); font-size: .875rem; line-height: 1.3; }
.x-s3d__tag.is-left .x-s3d__tag-line { margin: 0 5px 0 0; background: linear-gradient(270deg, rgba(80,162,255,.9), rgba(80,162,255,.25)); }

.x-s3d__gauges { position: absolute; right: 1rem; bottom: 1rem; width: min(250px, 52%); padding: .75rem .85rem .7rem; display: grid; gap: .55rem; border: 1px solid var(--s3d-line); border-radius: 12px; background: rgba(20,20,23,.82); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); z-index: 2; opacity: 0; transform: translateY(6px); transition: opacity 360ms var(--ease-out, ease), transform 360ms var(--ease-out, ease); pointer-events: none; }
.x-s3d__gauges.is-on { opacity: 1; transform: none; }
.x-s3d__gauge { display: grid; gap: .3rem; opacity: .35; transition: opacity 360ms; }
.x-s3d__gauge.is-on { opacity: 1; }
.x-s3d__gauge-k { font: 500 .8125rem/1 var(--font-mono); color: var(--s3d-tx); }
.x-s3d__gauge-bar { position: relative; height: 6px; border-radius: 3px; background: #27272A; }
.x-s3d__gauge-bar i { position: absolute; left: 0; top: 0; bottom: 0; width: 0; border-radius: 3px; background: linear-gradient(90deg, #B45309, var(--s3d-heat) 60%, var(--s3d-heat2)); transition: width 2.4s var(--ease-out, ease); }
.x-s3d__gauge-bar b { position: absolute; top: -4px; bottom: -4px; left: 94%; width: 2px; border-radius: 1px; background: var(--s3d-tx); }
.x-s3d__gauge.is-on[data-g="0"] .x-s3d__gauge-bar i { width: 58%; transition-duration: 3.6s; }
.x-s3d__gauge.is-on[data-g="1"] .x-s3d__gauge-bar i { width: 91%; }
.x-s3d__gauge-note { font-size: .75rem; line-height: 1.3; color: var(--s3d-mu); }

.x-s3d__ctrl { position: absolute; left: 1rem; right: 1rem; bottom: 1rem; display: flex; align-items: center; gap: .5rem; z-index: 2; pointer-events: none; }
.x-s3d__btn { pointer-events: auto; display: inline-grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 1px solid var(--s3d-line2); border-radius: 50%; background: rgba(20,20,23,.8); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); color: var(--s3d-tx); cursor: pointer; transition: border-color var(--dur-fast, 160ms), background var(--dur-fast, 160ms); }
.x-s3d__btn:hover { border-color: var(--s3d-blue); background: rgba(27,27,30,.95); }
.x-s3d__btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.x-s3d__btn--play .i-play { fill: currentColor; stroke: none; display: none; }
.x-s3d__btn--play.is-paused .i-play { display: block; }
.x-s3d__btn--play.is-paused .i-pause { display: none; }
.x-s3d__prog { flex: 1 1 auto; max-width: 160px; height: 2px; margin-left: .5rem; border-radius: 1px; background: var(--s3d-line2); overflow: hidden; }
.x-s3d__prog i { display: block; height: 100%; width: 100%; background: var(--s3d-blue); transform-origin: left; transform: scaleX(0); }
.x-s3d.is-paused .x-s3d__prog { opacity: .4; }

@media (max-width: 960px) {
  .x-s3d.is-webgl .x-s3d__body { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; }
  .x-s3d__panel { grid-template-columns: minmax(0, 1fr); }
  .x-s3d.is-webgl .x-s3d__step::before { left: 0; }
  .x-s3d.is-webgl .x-s3d__step-btn, .x-s3d.is-webgl .x-s3d__step-d { padding-left: .9rem; }
  .x-s3d.is-webgl .x-s3d__step-d { padding-left: 3rem; }
}
@media (max-width: 600px) {
  .x-s3d__stage { aspect-ratio: 1 / 1.08; border-radius: var(--radius-lg, 16px); }
  .x-s3d__tabs { display: flex; width: 100%; }
  .x-s3d__tab { flex: 1 1 auto; justify-content: center; padding: 0 .55rem; font-size: .8125rem; }
  .x-s3d__tab-n { display: none; }
  .x-s3d__panel { padding: 1rem; }
  .x-s3d__hint { display: none; }
  .x-s3d__tag-text { font-size: .8125rem; }
  .x-s3d__tag-line { width: 20px; }
  .x-s3d__gauges { left: .75rem; right: .75rem; bottom: 4.25rem; width: auto; grid-template-columns: 1fr 1fr; gap: .4rem .75rem; padding: .6rem .7rem; }
  .x-s3d__gauge-note { grid-column: 1 / -1; }
}
.x-s3d.is-boot *, .x-s3d.is-boot *::before { transition: none !important; }
@media (prefers-reduced-motion: reduce) {
  .x-s3d *, .x-s3d *::before { transition-duration: 0ms !important; }
  .x-s3d__prog { display: none; }
}